Direct-sales businesses that rely on home-based representatives to peddle their wares are seeing their sales forces rapidly expand as the nation's unemployment rate soars to nearly 9% and those who lost jobs and nest eggs look for new ways to make money. Companies such as Isagenix, a marketer of weight-management and nutritional supplements and snacks, and jewelry maker Silpada Designs are coaching their representatives to spread the word that direct selling can keep you afloat in the faltering economy.